Semimechanical telephone system



W. G. BLAUVELT. SEMIMECHANICM. TELEPHONE SYSTEM. PPLlcAnoN FILED APR. U,1917.

ATTQRNEYJ w. G. LAuvELT. SEMIMECHANICAL TELEPHONE SYSTEM.

APPLICATION FILED APR. Il, 19H.

Patented Nov. 23, l1920.

2 SHEETS-SHEET 2.

' INVENTOR Wlazwelz BY l@ "/MJL/ ATTORNEYJ UNITED STATES PATENT QFFEC.

WILLIAM Gr. BLAUVELT, F NEW YORK, N. Y., ASSIGNOR TO AMERICAN TELEPHONEAND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.

SEMIMECHANICAL TELEPHONE SYSTEM.

Application filed April 11, 1917.

il 'o all whom l may concern:

Be it known that l, WILLIAM G. BLAU- vnL'r, residing at New York, in thecounty of New York and State of New York, have invented certainlmprovements in Semi mechanical Telephone Systems, of which thefollowino` is a specilication.

This invention relates to semi-automatic telephone systems and moreparticularly concerns the provisions of means whereby when an operatoranswers call by inserting the plug` of an idle cord circuit into thejack of the calling subscriber, the operators talking set and associatedapparatuswill be automatically connected with that parti cular cordcircuit,

It is one of the objects of this invention to provide means whereby thetime necessary to effect this operation shall be reduced to a minimum,and the 'apparatus utilized therefor shall be simple in construction ande'iicient in operation. lt is proposed to accomplish this and otherobjects hereinafter appearing by providing a sequence switch of thegeneral type shown in ll. S. patent to McBerty, 1,105.811 of August lf.,191s-, or patent to Reynolds, et al., 'l.-2`,808 of February 9, lll,common to all of the cords at an operators position, said switchfunctioning upon the insertion of the plug of a cord `into an answeringjack to connect the operators set to the cord taken for use. This resultis accomplished by providing a relay apparatus in dividual to the cordand operating to connect thereto the operators set, the circuit of therelay,T ai paratus being under the oint control of a contact of thesequence switch, and a relai.7 contact, or key individual to the cordtaken for use.

The invention will be more fully understood by reference to theaccompanying drawing Figures l and 2 of which when placed end to endcomprise a diagram illustrating as much of the circuit arrangemen as isnecessary to understand the invention.

"r single cord circuit is illustrated but it will be understood thatthere are a plurality cords at each operators position, each cord havingindividual thereto a sequence switch 100 which controls the switching ofan idle sending apparatus into connection with a cord taken for use, aswell, as Jthe Specification of Letters Patent.

Patented N ov. 23, 1920.

Serial No. 161,278.

gram, but in practice the contacts are arranged in a set as shown in thepatents above cited. T he contacts controlled by sequence switch 100 aredesignated by numbers whose hundreds digit is l while those controlledby sequence switch 200 are designated by numbers whose hundreds digit is2. Switch 100 has eighteen positions while 200 has but nine positions.

With this brief description in mind the invention may be fullyunderstood from a description of the operation.

Us@ of connecting olrouz't when listening soguonoe stolto/t s n position1.

Upon the operator inserting the plug l) of an idle cord into the jack ofa calling subscriber relay is energized and closes its front contacts 2land 22. Front contact 2l closes a circuit for the listening sequenceswitch 200 from battery, motor magnet of sequence switch 200, sequenceswitch contact 201 to common terminal 23 from which branches extend toeach of the cords, the circuit in this instance extending from terminal23 over sequence Contact 101 in position l, and over contact 2l of thecord circuit taken for use to back contact 24 of relay 25 and sequenceswitch contact 202 to ground. rThis drives sequence switch 200 out ofposition l. As it reaches position 2 sequence switch contact 201 opensbut under the control of spring 204, closed in all positions except land 7, the sequence switch 200 continues to rotate to po sition 7, thelistening in position, where it stops. As it passes through position 2the listening relays 25 and 26 are energized over a circuit frombattery, relays 26 and 25, lower sequence switch contact 103, contact 22of rela-y20, common terminal 27, lower sequence switch contact 203 toground. It will be understood that similar circuits branch from terminal27 to the listening relays of all the cords of the position. Upon theenergiza` tion of relay 25 a locking circuit is provided frombattery,relays 25 and 26, front contact 24- ot relay 25, contact 202 toground. Simultaneously with the energization of relays 25 and 26 acircuit is established for the distiict sequence switch 100 over uppercontact 102, front Contact 22 of relay 21, Contact 203 now in position 2to ground, thereby driving 100 into position 2, in which position asender is associated with the cord as follows: As sequence switch 100passes into position 2, a circuit is closed from ground, back contact ofarmature 34 of relay 32, upper contact 107, contact 301 of the cordfinder sequence switch 300 and through the winding of the motor magnetof said switch to battery, driving 300 into position 2. A circuit is nowclosed over the back contact of test relay 40 and upper Contact 302through the winding of the motor magnet 41 of the cord finder switch,which now rotates its wipers 42, 43, 44 and 45 over the contacts of thevarious cord circuits until wiper 43 rests on contact 47 of the cordwhich has just been inserted in an answering jack as above described,when .a circuit is closed over back contact of armature 34 of relay 32,upper contact 108, contact` 47, wiper 43, upper contact 303 and windingof test relay 40 to battery. Test relay 40 now pulls up,` opening thecircuit of motor magnet 41 so that the finder comes to rest, and closingat its front Contact a circuit over contact 304 for the motor magnet otsequence switch 300, thereby driving said switch into position 5. Inthis position a new circuit is established for test relay 40 fromground, over back contact of armature 34, contact 113, Contact 46, wiper42, contact 401 of sender sequence switch 400 winding of relay 50, lowercontact 303, winding of test relay 40 to battery. Relay 40 ismaintained, energized over this circuit and relay 50 is now energized,closing at the front contact ot its armature 51, a circuit over upperContact 402 Jfor the motor magnet of sender seouence switch 400, wherebysaid switch is driven to position 2. The operator now sets upthe callupon a rey board (not shownl and in so doing closes a contact 53 wherebya circuit for sequence switch 400 is closed over Contact 403 drivingseouence switch 400 into position 3. Contact 404 is now closed so thatthe sender, indicated schematically at 54 is connected to the cordcircuit over wipers 44 and 45 and contacts 114 and 115 of sequenceswitch 100. As soon as relays 25 and 26 were operated the operators setwas connected to the cord circuit over extension 39 so that the ringback keys 55 and coin control key 56 could be used`r as well as themaster restoring key 57 and the Us@ of master restoring keg when 100 Vianotin position 2.

Vllt with sequence switch 100 in a position later than 2 and sequenceswitch 200 in position 7-the listening in position-the operator desiresto listen out, she deprcsses the master listening out key 53 and drivesthe listening sequence switch 200 from position 7 into position 1 by acircuit over contact 201, key 58, upper sequence switch contact 203 toground. VIn passing through positions 8 and 9 contact 202 opens andunlocks the listening relays 25 and 26. It with switch 100 in position2, the key 58 is depressed another action takes place which will bedescribed later.

l' Plugging in when 200 ic in position 7.

It an operator is listening in on one cord and plugs in with another,her set is cui'. ofi of the first cord and onto the second as ond cordthe relay 20 of that cord operates and drives listening sequence switch200 out of position 7 by aV circuit .from ground over upper contact 202to common terminal 23 from which branches extend'to the various cordcircuits. From 28 the circuit extends over theback contact 24 oflistening relay 25 of the cord just plugged in (relay 25 of this cordwill be denergized), front contact 21 of relay 20 of the cord justplugged in, upper contact 101 of sequence switch 100 associated withsaid cord to common terminal 23, from whence it proceeds over contact201 (now closed in position 'T of sequence switch 200) to motor magnetof said sequence switch 200 and battery.

Switch 200 is now driven to position 1 under control of spring 204, andin positionl the saine circuit is again closed at contactV 201 anddrives 200 into listening position 7 in which the listening' relays ofthe cord last plugged in are locked up. As switch 200 passed throughpositions 8 and 9 on its way to position 1 the locking cir'uit oflistening relays 25 and 26 of the rst cord was opened at contact 202,causing said relays to restore to normal, so that the operator haslistened out on the first cord and is listening in on the second. Switch100 ot the second cord is driven into position 2 over contact 102 asdescribed under the first heading.

Listening in, 100 in position 3 to 17 inclusive' and Q00 in position I.

cord, front contact 21 of relay n inalre beiore break contacts so thatno click is given the subscriber when the operator listens in. Listeningin 100 in positions 3 to 1 7' inelusive, cmd 200 iii positionv 7.

1i the operator is listening in on one cord and desires to listen in ona second cord already employed in an established connection, she pressesthe listening` hey 59 or" the second cord closing a circuit driving`listening switch 200 roni position 7 to position 1 from ground, contact202, to common terininal 28, thence over baclr Contact 24roii listeningrelay 25 of the second cord, spring 29 of key 59, contact 201, winding`oi 200 to battery. In passing through positions 8 and 9 the listening`relays 25 and 26 of the first cord are unlocked. Upon reaching position1, listeningswitch 200 is driven to listening,l position 7 by the sainecircuit, the listening relays 25 and 20 oi" the second cord being,`operated and locked up as described under the first heading.

Listening 0ut*100 in position 2.

1ii the operator answers a call by plugging into a jack and desires tolisten out from the cord without setting up a connection, it isdesirable that the sender which was associated with that cord when shelistened in should be disconnected in order that the sender niay not bekept idle by being lett attached to the connection. 1f, then, withdistrict switch 100 ot the irst cord in position 2, and listening;switch 200 in position 7, the operator plugs in with a second cord,listening switch 200 will be driven through positions 8 and 9 toposition 1, unloclrine the listening` relays of the iirst cord, and thendriven on to position T again. 1When 200 reaches position 1 on its wayto 7, the district switch 100 oif the first cord will be driven topositionI 18 by the lfollowing,` circuits:

From ground, upper contact 202, terminal 28, back Contact 24 of relay 25of the first 20 of the first cord, lower contact 101 ot the districtswitch of the first cord, now in position 2, back contact 31 oflistening relay 26 of the iirst cord,'sequence switch contact 104 of theiirst cord (closed in position 2), winding` of relay 32 to battery.Relay 32 is energized and locks up over its contact 33 and uppersequence switch contact 105 to ground 'from position 2 to 10 inclusive,and at its contact 341 closes a circuit for sequence switch 100 overlower contact 102, driving sequence switch 100 into position a undercontrol ot its contact 110. position 4- relay 37 is energized over acircuit from battery, contac 36 ot relay 32, relay 37, contact 107 toground, thereby closino` circuit for 100 from battery, winding` or 100,lower contact 109, contact 38 of relay Si' and contact 108 to ground.Sequence switch 100 is then driven to position 3 through position 5under control of master contact 110, in which position the circuit overcontact 3-/1 oit relay 32 drives the sequence switch to position .7.

nog

1n position 7 the circuit controlled by relay 3'? drives the sequenceswitch to positie,I 8 from which it passes to posiiionnl: under joint`control or master contact 110 and contact 34 ot' relay Switch 100 iscarried out oit' position 14 by a circuit closed over the bacl `contactoi relay 35 and contact 106, driving the switch into position 1T. inthis position a circuit is closed tor relay over lower contact 105,closing,` at the :front contact 36 oi relay 32 a circuit 'from batterythrough relay 37 to ground over contacL 10'?. Relay 3?' is energizedclosing a circuit *roin ground over contact 108, ti t contact 8 o` relay37 lower contact 109, winding' oit 100 to battery, driving switch 100into position 18. As soon as switch 100 passed position the sender wasreleased as follows:

T he circuit ot the test relay 420 ot the cord l'inder switch was openedby relay on pulling` up its armature 3e, as well as by the opening or113. Test relay f1-,0 relay 50 now denergize, test rel i0 closing at itsback contact a circuit o lower con'- tact 302, energizing' motor magnet300 to drive "the cord iinder seauence switch through position 18 toposition 1. The wipers ot the iinder switch have no normal position butare allowed to remain associated with the contacts of the cord circuitlast used. Relay 50 in denergizinp,` at the back contact oi' itsarmature closes circuit over lower Contact 102 to drive the sendersequence switch L100 through position 18 to norinal. The sender circuitis now onen at contact 404 and as contact 1111 and 115 of the sequenceswitch 100 were opened as that switch passed out oi" position 6, thesender is disconnected from the cord even though wipers la and i5 stillrest on contacts E8 and 19.

1t instead ot plugging in with another cord, the operator, with 100 inposition 2 and 200 in position 7 presses the master listening' out ley58 a similar effect will be produced as a circuit will be closed tor 900over contact 201 and the spring' oi 58 to ground over upper Contact 203,driving 200 into position 1, unlocking relays 25 and Cri and closing acircuit from ground over contact 202, back contact 2e of relay 25, frontContact 21 o'i' relay 20, lower contact 101 in position 2 of switch 100,back contact 31 of relay 26, contact 10-1- and relay 32 to battery,whereby relay 32 locks up and closes a circuit to drive switch 100 intoposition 18'as just described.

Listening in, 100 being in position 18.

l/Vhen the operator wishes to return to a connection such as justdescribed, she depresses the listening key 59 of that cord, sequenceswitch 100 being in position 18. A circuit for sequence switch 200 isnow closed 'trein ground, contact 202, back contact 211 oi" relay 25,spring 29 of key 59, contact 201, motor magnet 200 to battery, driving200 to position 7. is it passes through position 2 a circuit is closedYfor listening relays 25 and 26 over contact 30 of key 59, and lowercontact 203 to ground, said relays locking up over front contact 24 ofrelay 25 and Contact 202. i circuit is also closed in position 2 otsequence switch 200 over Contact 203, contact ot key 59, upper Contact103, winding ot inotor magnet ot switch 100, driving switch 100 fromposition 18 to position 1, where it is carried into position 2 by acircuit either Ytrono ground over lower contact 203, (it sequence switch200 is still in position 2) thence over front contact 22 otl relay 20,up ier contact 102, winding of inotor magnet oi' switch 100 to battery,or, it sequence switch 200 ha passed beyond position 2, from ground,Contact 202, front contact 24 of listening relay 25. lower contact 103,upper contact 102, to the motor magnet oit sequence switch 100 andbattery. 1n position 2 or" sequence switch 100 a sender' is associatedwith the cord in a. manner already described and when sequence switch200 reaches position 7 the listening relays are lockedup in the manneralready described.

Use of master restoring leeg/ rt any time when listening in7 thedistrict sequence switch 100 being somewhere between positions 2 to 6inclusive, the operator may control the relay 532, by means et masterrestoring key 57. lllhen this key is cepressed current flows from groundcontact of key 57 front contact 31 oit listening relay 26, contact 10-1,relay 32 to battery, said relay pulling up and locking over its contact33 ano. sequence switch contact 105. The district seouence switch willthen be rotated to position 1S as already described under the headingcListening out-100 in position 2.

is this result is etlectedwithout disturbing listening sequence switch200 which is now in listening position 7, relay 25 will still beenergized and a circuit will be closed from ground over Contact 202,front contact 211 of relay 25, upper contact 103 closed inYpositionrlSl, motor inagnet ot sequence switch 100 to battery, drivingequence switch 100 into position 1. rEhe sender was disconnected afterpassing position 6 and associated apparatus restored. 1n position 1 ol?100, 200 stili being in listening position 7, a circuit is closed troniground over contact 202, front contact 24 of relay 25, lower Contact103, upper Contact 102, motor magnet 100 to battery, driving 100 intopositi n 2, where a new sender is associated with the cord. rl`hus theold connection has been restored and the apparatus is ready to set np anew connection.

The master restoring key is inellective after the district sequenceswitch has passed position 6.

'llitlzclreioing L@vlag while listening in.

li', while the operators set is connected to a cord, listening switch200 being in position 7, the operator withdraws the plug from the jack,relay 20 is denergized, but no circuitchanges take place, since groundis cut ot' 'from contact 21 ot relay 20, over contact 202, by reason etthe Jfact that listening relay is energized and its contact 24; does notrest on the back contact leading to armature 21 ot relay 20. rlhispermits pulling the plug and re-inserting it without disturbing theconnection.

l/Vitlzflmieing plug while listening out 1f, while listening out, withlistening switch 200 in position 1 and the district switch 100 inpositions 2 to 6 inclusive, the operator pulls down a cord, the cord isreturned to normal, a circuit being closed from ground over contact202back contact of armature 24 of relay 25, back contact 21 ot relay 20,(now denergized), back contact 31 of relay 26, contact 104, relay 32 tobattery, energizing relay 32, which 'locks up, and returns switch 100 toposition 18 as described under heading Listening out, 100 being inposition 2.

It, however, when the operator pulls down, sequence switch 100 is in aposition past position 7, a circuit is closed troni ground, contact202,r back contact 24; of relay 25, back contact 21 of relay 20, uppercontact 109, motor magnet 100 to battery, driving 100 to position 14,from which position it is carried to position 17 by the line relay 85and by contact 110, and to position 18 by relay 87 asalready described.In position 18, the original circuit over upper contact 109 is closeddriving 100 into position 1.

lllilirlmwing plug while listening ini on another eorcl.

It, while the operator is listening in on one cord, she pulls down asecond cord, the

second cord Will loe returned to normal as described under previousheading, because since the listening relay 25 oi' the second cord isdenergized, its armature 2i is on, the back contact so that a groundconnection to contact 2l oit relay 20 exists.

t will be seen from the foregoing that a simple yet eliicient means forautomatically controlling the connection and disconnection of theoperators set to a cord circuit is provided, and While the invention isshown embodied in a certain torn it Will be understood that theembodiment ma be Widel varied Without departing from the scope of theinvention as dened in the following claims.

l/Vhat l claim is:

pl. ln a telephone system, a plurality oi cord circuits, an'operatorsset, controlling means common to all of the cord circuits, othercontrolling means individual to each cord circuit, and means under thejoint control ci said common controlling means and the controlling meansindividual to a cord circuit for connecting said operators set to suchcord circuit.

2. ln a telephone system, a plurality or" cord circuits, an operatorsset, controlling means common to all ot the cord circuits, switchingmeans individual to a cord for connecting operators set thereto,controlling means also individual to each cord, and a circuit 'for saidswitching means, closed by the jointaction of the common controllingmeans and the controlling means individual to each cord.

3. ln a telephone system, a plurality ot cord circuits, answering jacks,an operators set, a listening relay tor eaclicord circuit to connect theoperrors set thereto, a controlling relay int ual to each cord energizedupon plugging the cord into an answering jack, a controlling meanscommon to all. oli said cords anc having a listening in position andlistening out position, said common controlling means assuming itslistening in position when said individual controlling relay isenergized, and a circuit 'for said listening relay closed when theindividual controlling relay is energized and said common controllingmeans is in listening in position.

el, ln telephone system, a plurality of coro circuits, an operators set,a listening relay for each cord circuit to connect the operators setthereto, a controlling key individual to each cord, a controlling meanscommon to all ci said cords and having a listening in position and alistening out position, said common controlling means assuming itslistening-in position when said -ontrolling key is operated, and acircuit tor said listening relay closed 1when said controlling key isoperated and said common controlling means is in listening in position.

5. ln a telephone system, a plurality oi' telephone circuits, a relayindividual to each telephone circuit energized when the circuit istalren for use, an extension circuit over which of said telephonecircuits may be extended, connecting means tor associating saidextension circuit with a telephone cirlcuit, and a common switchingmeans, said connecting meanc operating under the joint control ot saidcommon switching means and a relay individual to a telephone circuit, toconnect sucli telephone circuit to said entension.

6. ln a telephone system, a plurality of cord circuits, answering jacks,an operators set, a controlling means common to all of the cords andhaving a listening in position and a listening out position, meansresponsive to the plugging or a cord into an answering jack to causesaid controlling means to assume its listening in position, meansoperative when the controlling means. is in listening in position toconnect the operators set to the cord circuit plugged in, and meanscontrolled by the operator to cause the controlling means to assume itslistening out position and thereby disconnect the operator-s set.

7. ln a telephone system, a plurality of cord circuits, answering jacks,an operators set, a controlling means common to all oi the cords havinga listening in position and a listening out position, means responsiveto he plugging of a cord into an answering unie its listening inposition, means operative when the controlling means is in listening inposition to connect he operators set to tiie cord circuit plugged in,and means responsive to the nlufmino` of a second cord 1 l "17D t3 intoiacl; when the operators set is connected to the first cord to cause thecontrolling means to assume its listening out position, therebydisconnecting the operators set from the lirst cord, and thereafter' toagain assume its listening position thereby connecting the operatorsset' to the second cord.

8, ln a telephone system, a plurality of cord circuits, an. operatorsset, a controlling means non to all of the cords having a listen.' inposition and a listening ..t -fitioi e vill 'to c s said controlling toassume its listening in position and thereby control the connection ofthe operators set to a particular cord, and means operative at Will whenthe operators set is connected to one cord to translate said controllingmeans from its listening in position to its listening out p0- sition andthen back again to its listening in position, thereby controllngdisconnection of the operators set from said cord and its connection toa second cord.

9. ln a telephone system, a plurality of iaclr to cause said controllingmeans to ascord circuits, an operators set, a sender, a sequence switchindividual cach cord circuit, a listening sequence switch common to allof the cord circuits and having a listening in position and a listeningout position, means operative when said listening sequence switch is inlistening in position to connect the operators set with a cord, meansoperative when said listening sequence switch has moved out ot itslistening out position, to cause the sehnen-'3e switch individual to acord to assume an off-normal position, means operative when theindividual sequence switch is in such oli-normal position to cause thesender to be associated with the cord circuit, and means under thecontrol of the operator operating to cause said listening sequenceswitch to assume its listening out position, thereby disconnecting theoperators set.

lO. ln a telephone system, a plurality of cord circuits, an operatorsset, a sender, a sequence switch individual to each cord circuit, alistening sequence switch common to all of the cord circuits and havinga listening in position and a listening out position, means operativewhen said listening sequence switch is in listening in position toconnect the operators set with a cord, means operative when saidlistening sequence switch has moved out oic its listening out position,to cause the sequence switch individual to a cord to assume anoit-normal position, means operative when the individual sequence switchis in such oli-normal position to cause the sender to be associated withthe cord circuit, said individual sequence switch having otherott-normal positions, and means under the control of the operatoroperating to cause said listening sequence switch to assume itslistening ont position and also causing the sender to be released it theindividual sequence switch is in its first off-normal position, butoperating to disconnect the operators set without releasing the senderit the individual sequence switch is in another oE-normal position.

11. In a telephone system, a plurality ot cord circuits. answeringjacks, an operators set, a controlling means common to all of the cordshaving a listening in position and a listening out position, meansresponsive to the plugging of a cord into an answering jack to causesaid controlling means to assume its listening in position, meansoperative when the controlling means is in listening in position toconnect the operator's set tothe cord circuit plugged in, andmeanscontrolled by the operator to cause the controlling means to assumeits listening out position and thereby disconnect the operators set, andmeans operative when the pluff is withdrawn while the operators set sdisconnected to restore. the. cord circuit to normal, but ineffective ifthe plug is withdrawn while the operators set is connected.

12. ln a telephone system, a plurality1 of cord circuits, an ope xtoidsringbaclr and coin control key common to said cord circuits, controllingmeans common to all 0f the cord circuits, other controlling meansinnividual to each cord circuit, and means under the oint control ofsaid common controlling means and the controlling means individual to acordL circuit, tor connecting said operators keys to an individual cordcircuit.

13. ln a telephone system, a plurality of cord circuits, an operatorsset, a sender, a sequence switch individual to each cord circuit, alistening sequence switch common to all of the cord circuits and havinga listenin position and a listening out position, means operative whensaid listening sequence switch is in listening in position to connectthe operators set with cord, means operative when said listeningsequence switch has moved out of its listening out position, to causethe sequence switch individual to a cord to assume an off-normalposition, means operative when the individual sequence switch is invsuch olli-normal position to cause the sender to be associated with thecord circuit, said individual sequence switch having other off-normalpositions, means under the control of the operator operating to causesaid listening sequence switch to assume its listening out position ndalso causing the sender to be released it the individual sequence switchis in its first ofi-normal position, but operating to disconnect theoperators set without releasing the sender if the individual sequenceswitch is in another off-normal position, and means under the control ofthe operator after the sender has been thus released tol` cause theindividual sequence switch to assuine its iirst, oil-normal positionwhereby a sender is again associated. with the cord circuit.

lll. ln a telephone system, a plurality of cord cricuits, an operatorsset common tov said cord circuits, controlling means common to the cordcircuits, other cfr-.trolling means individual to each cord circuit,means under the joint control of said controlling means to connect theoperators set to a corel4 circuit and associate a sender therewith, andmeans whereby an operator while listening in may restore a set upconnection and prepare the apparatus associated with the cord circuitfor a new connection.

l'n testimony whereof l have signed my name to this specification in thepresence of two subscribing witnesses this third day of April, 1917.

VILLIAM G. BLAUVELT.

Witnessesz H. M. BAscoM, EDWARD C, MOLINA.

